blob: a69c88667ea732ab2c2fda42998849ebe5a6f2e3 [file] [log] [blame] [view]
<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
# a complete C rest client demo project
## project structure
- base64.c/base64.h: a util for base64.encode/decode
- main.c: call the rest api for IoTDB
## How to build
dependency: libcurl
- example: Ubuntu 16.04 STL (Ubuntu 20.04 may have some problems)
```shell script
sudo apt-get install libcurl4-openssl-dev
```
Before build, you must install the libcurl.
build steps:
```shell script
mkdir build
cd build
cmake ..
make
```
Eventually, you will get an executable program `c_rest_iotdb` in `build` directory.
## cross compilation
- os : Ubuntu 16.04 STL
1. choose and install cross compiler according to the target host
arm-linux-gnueabihf-gcc as an example.
- arm-linux-gnueabihf-gcc
```shell script
sudo apt-get install gcc-arm-linux-gnueabihf
```
2. cross compile libcurl
- download the *.tar.gz in https://curl.haxx.se/download/, and uncompress it.
- compile and install
```shell script
./configure --host=arm-linux/arm-linux-gnueabihf/others CC=arm-linux-gnueabihf-gcc --prefix=`install dir` --enable-static --with-wolfssl
make
make install
```
3. cross compile the example program
```shell script
arm-linux-gnueabihf-gcc main.c base64.c -o c_rest -L `(libcurl install dir)/lib/` -l curl
```
if can't find `curl/curl.h`, you can just simply change to the absolutely path or specify the include path.
Reference Materials
libcurl usage:
https://blog.csdn.net/myvest/article/details/82899788
compilation:
https://blog.csdn.net/u011641885/article/details/46900771
https://www.cnblogs.com/flyinggod/p/10148228.html
https://blog.csdn.net/fangye945a/article/details/86500817
https://www.cnblogs.com/yxh-l-0824/p/13254891.html
https://www.cnblogs.com/tansuoxinweilai/p/11602830.html
https://www.cnblogs.com/pied/p/8805883.html